The accident occurred around 7:15 p.m. when a man in his 30s who was backing out of a driveway hit the boy as he rode his scooter in the 20200 block of Vista Court, according to the Santa Clara County Sheriff's Office.
Deputies and medical personnel arrived at the scene to find the boy conscious and still breathing, and transported him to a hospital, sheriff's officials said.
At 11:45 p.m. Tuesday, the sheriff's office learned that the boy had succumbed to his injuries.
The driver is cooperating with the investigation, and is not believed to have been under the influence of drugs or alcohol, according to the sheriff's office.
The medical examiner's office and the sheriff's traffic accident reconstruction team are investigating the death.